* add signing spec

* fixes from review

* more fixes

* fixes from review

* Enforce validators can only use the correct pubkey type

* adapt to variable renames

* Address comments from #2636

* separate updating and validation logic

* update spec

* Add test case for TestStringSliceEqual, clarify slice copying code

* Address @ebuchman's comments

* Split up testing validator update execution, and its validation

Quick fix for #2902

* Vagrantfile: install dev_tools

Follow-up on https://github.com/tendermint/tendermint/pull/2824

* update consensus params spec

* fix test name

* rpc_test: panic if failed to start listener

also
- remove http_server#MustListen
- align StartHTTPServer and StartHTTPAndTLSServer functions

* dep: allow minor releases for grpc

* tmhash is fully 32 bytes. closes #1990

* AddressSize

* fix tests

* fix max sizes

* reorder fields

* add TestVoteString & update tests

* remove redundant info from Proposal.String()

* update spec

* revert changes on vote.String() -> more human friendly

* types: first field in Canonical structs is Type

* fix spec

* types: dont use SimpleHashFromMap for header. closes #1841

* changelog and spec

* comments

* types: add Version to Header

* abci: add Version to Header

* state: add Version to State

* node: check software and state protocol versions match

* update changelog

* docs/spec: update for versions

* state: more tests

* remove TODOs

* remove empty test

* Hash() uses tmhash instead of merkle.SimpleHashFromMap

* marshal whole struct

* update comments

* update docs

* WIP: switching to fixed offsets for SignBytes

* add version field to sign bytes and update order

* more comments on test-cases and add a tc with a chainID

* remove amino:"write_empty" tag

- it doesn't affect if default fixed size fields ((u)int64) are
written or not
- add comment about int->int64 casting

* update CHANGELOG_PENDING

* update documentation

* add back link to issue #1622 in documentation

* remove JSON tags and add (failing test-case)

* fix failing test

* update test-vectors due to added `Type` field

* change Type field from string to byte and add new type alias

- SignedMsgType replaces VoteTypePrevote, VoteTypePrecommit and adds new
ProposalType to separate votes from proposal when signed

- update test-vectors

* fix remains from rebasing

* use SignMessageType instead of byte everywhere

* fixes from review

* require block.Time of the fist block to be genesis time

Refs #2587:

```
We only start validating block.Time when Height > 1, because there is no
commit to compute the median timestamp from for the first block. This
means a faulty proposer could make the first block with whatever time
they want.

Instead, we should require the timestamp of block 1 to match the genesis
time.

I discovered this while refactoring the ValidateBlock tests to be
table-driven while working on tests for #2560.
```

* do not accept blocks with negative height

* update changelog and spec

* nanos precision for test genesis time

* Fix failing test (#2607)

* types: Remove pubkey from validator hash

* undo lock file change

* Update Spec

* switch to amino for SignBytes and add Reply with error message

- currently only Vote is done

* switch Reply type in socket for other messages

 - add error description on error

* add TODOs regarding error handling

* address comments from peer review session (thx @xla)

 - contains all changes besides the test-coverage / error'ing branches

* increase test coverage:

 - add tests for each newly introduced error'ing code path

* return error if received wrong response

* add test for wrong response branches (ErrUnexpectedResponse)

* update CHANGELOG_PENDING and related documentation (spec)

* fix typo: s/CanonicallockID/CanonicalBlockID

* fixes from review

* ungitignore
* add docs/.vuepress to enable local builds
* config.js needs to be here, one less step
* docs: make spec in sidebar nicer
* docs: local build instructions

* addr_book_strick=false on local nets

* link to spec

* spec: remove TODO, see #1749 instead

* spec: make issues from TODOs

* update docs on addr_book_strict option

* lint docs with write-good, stop-words

* remove package-lock.json

* update changelog

* fix wrong paragraph formatting

* fix some docs formatting

* fix docs format

* fix abci spec format

Refs #1134

Validation:

- ignored in block.ValidateBasic since it's stateful information
- checked in blockExec.ValidateBlock

* docs: deprecate specification dir, closes #1814

* update genesis

* old spec dir, deprecation complete

* rm a file

This reverts commit d02c5d1e30.

protobuf -> proto
protobuf version X -> protoX

This reverts commit 96a3502

according to: https://github.com/tendermint/go-crypto/pull/110#issuecomment-394048086